A truckload of seed wheat and rye awaits planting near Orlando, Okla., back in 2012, when the price per bushel of wheat was 50 percent higher than it is now. Sue Ogrocki/AP hide caption

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Low Wheat Prices Leave A Gluten Glut At Midwest's Grain Elevators
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Dan Selvig says wetter conditions helped convince his family to shift their plantings to corn. John Ydstie/NPR hide caption

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Shifting Climate Has North Dakota Farmers Swapping Wheat For Corn
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An FDA rule effective Aug. 5 states that foods may be labeled "gluten free" only if there's less than 20 parts per million of the protein. James Benet/iStockphoto hide caption

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Truth In Labeling: Celiac Community Cheers FDA Rule For Gluten Free
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Wheat fields like this one could yield wheat with less zinc and iron in the future if they are exposed to higher levels of CO2, according to the journal Nature. Zaharov Evgeniy/iStockphoto.com hide caption

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Less Nutritious Grains May Be In Our Future
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The world is increasingly relying on a few dozen megacrops, like wheat and potatoes, for survival. Above, a wheat field in Arkansas. Danny Johnston/AP hide caption

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In The New Globalized Diet, Wheat, Soy And Palm Oil Rule
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About 40 years ago wheat breeders introduced new varieties of wheat that helped farmers increase their grain yields. But scientists say those varieties aren't linked to the rise in celiac disease. Karen Bleier/AFP/Getty Images hide caption

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Doctors Say Changes In Wheat Do Not Explain Rise Of Celiac Disease
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Wheat grows in a test field at Oregon State University in Corvallis. Some scientists believe that there's a chance that genetically modified wheat found in one farmer's field in May is still in the seed supply. Natalie Behring/Bloomberg via Getty Images hide caption

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In Oregon, The GMO Wheat Mystery Deepens
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Genetically modified wheat has been discovered growing in a field in Oregon. GMO wheat is not approved for sale in the U.S. Above, a wheat field in Arkansas. Danny Johnston/AP hide caption

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GMO Wheat Found In Oregon Field. How Did It Get There?
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